Milwaukee-based Harley said a clamp on an engine oil cooler line may not have been installed correctly. The company said it has nine reports of oil lines coming off. The problem caused two crashes and one minor injury.

Dealers will inspect the clamps and fix them free of charge. The recall is expected to start Tuesday.

“This is a voluntary recall in the interest of customer safety,” Harley said in a statement.

Separately, federal regulators said last summer that they were investigating complaints from Harley-Davidson owners who said their motorcycle brakes failed without warning.

The National Highway Traffic Safety Administration said the investigation covered 430,000 motorcycles with model years from 2008 through 2011. The investigation stemmed from bikes with an anti-lock braking system, according to NHTSA.

Riders reported that the brakes did not work, causing one driver to crash into a garage door. Government regulators said they received 43 complaints, three reports of crashes and two reports of injuries.

Regulators said it was possible that some riders who experienced brake failure did not change the motorcycle’s brake fluid every two years as recommended by Harley.

It was not a motorcycle product safety recall. Harley said it was aware of the investigation and that it was cooperating with regulators.